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Cellular scanning strategy for selective laser melting: Generating reliable, optimized scanning paths and processing parameters by Sankhya Mohanty; Jesper H. Hattel is a Engineering article available to read on EtoBox.

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Selective laser melting is yet to become a standardized industrial manufacturing technique. The process continues to suffer from defects such as distortions, residual stresses, localized deformations and warpage caused primarily due to the localized heating, rapid cooling and high temperature gradients that occur during the process. While process monitoring and control of selective laser melting is an active area of research, establishing the reliability and robustness of the process still remains a challenge. In this paper, a methodology for generating reliable, optimized scanning paths and process parameters for selective laser melting of a standard sample is introduced. The processing of the sample is simulated by sequentially coupling a calibrated 3D pseudo-analytical thermal model with a 3D finite element mechanical model. The optimized processing parameters are subjected to a Monte Carlo method based uncertainty and reliability analysis. The reliability of the scanning paths are established using cumulative probability distribution functions for process output criteria such as sample density, thermal homogeneity, etc. A customized genetic algorithm is used along with the simu

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Author

Sankhya Mohanty; Jesper H. Hattel

Publisher

SPIE

Published

2015

Language

EN

Field

Engineering (Physical Sciences)